Active report output caching

[face_f2000]

Hi there,
we run cognos 10.2.2. recently i created active report and scheduled it to run on a daily basis.
report's default action is set to "view most recent report". report output occurrences is set to 1.
i distributed report's link to the users however when they click it they see the very first output generated (not the most recent one).
even checking "delete browsing history on exit" in IE doesn't help.
it seems like an IIS setup issue.
i checked "expire web content" box and set it to "immediately" on both cognos virtual directory and cgi-bi application in IIS but it didn't help.
any ideas?
Thanks in advance!